package leetcode;

public class TreeNode {
       public  int val;
       public  TreeNode left;
       public  TreeNode right;
       public  TreeNode() {}
       public  TreeNode(int val) { this.val = val; }
       public  TreeNode(int val, TreeNode left, TreeNode right) {
                    this.val = val;
                    this.left = left;
                    this.right = right;
                  }
}
